What medical tests are required before bariatric surgery?

You finally made one of the most important decisions of your life: to have bariatric surgery. 

But now comes that question «"Why do I need to have so many medical tests?"» If you feel anxious or confused by the list of tests your doctor gave you, take a deep breath. Each of these exams has a vital purpose: ensuring that your body is prepared for this transformation and that your surgery will be as safe as possible.

In this article, I will explain in detail what medical tests are required before bariatric surgery, why they are necessary, and how to prepare for each one.

Why are tests so important before bariatric surgery?

The bariatric surgery It is a serious procedure that offers real benefits for health and quality of life. Precisely for this reason, it must be planned carefully.

Preoperative tests help the medical team to:

• Assess your overall health
  
• Identify potential risks before surgery
  
• Adjust the type of procedure that is most suitable for you
  
• Reduce complications during and after surgery
  

In other words: Tests exist to protect you, not to prevent surgery..

Complete List of Preoperative Examinations

Now let's get to what you came here for: the detailed list of medical tests required before bariatric surgery. Remember that each case is unique., Therefore, your doctor may request additional tests depending on your medical history.

1. Complete Blood Tests

Blood tests are the cornerstone of your pre-operative evaluation. Through a simple blood draw, your doctor obtains invaluable information about your overall health.

• Complete blood count: This test checks your red blood cells, white blood cells, and platelets. It can detect anemia, infections, or clotting problems that could complicate surgery.
  
  
• Blood glucose and glycated hemoglobin (HbA1c): They measure your blood sugar levels and how well you've controlled them over the past few months. If you're diabetic, these values help adjust your treatment before surgery.
  
  
• Lipid profile: Evaluate your cholesterol and triglycerides, important indicators of your cardiovascular health.
  
  
• Liver and kidney function: The liver and kidneys are vital organs that metabolize medications and eliminate toxins. They need to be functioning properly to withstand surgery and anesthesia.
  
  
• Vitamin and mineral levels: Vitamin B12, vitamin D, iron, and folic acid levels are specifically checked. Many people with obesity have deficiencies that must be corrected before the procedure.
  
  
• Preparation: Most require fasting for 8-12 hours. You can drink water. Consult your doctor if you need to temporarily stop taking any medication.

2. Cardiac Studies

Your heart is the engine that will keep you alive during and after surgery. Cardiac tests are essential.

• Electrocardiogram (ECG): This quick and painless test records the electrical activity of your heart. It detects arrhythmias, conduction problems, or signs of previous heart disease.
  
  
• Echocardiogram: It's an ultrasound scan of the heart that allows doctors to see its structure and function. It assesses the thickness of the heart walls, the function of the valves, and the heart's pumping capacity. Obesity can cause changes in the heart that need to be identified.
  
  
• Stress test: It's not always required, but if you have cardiovascular risk factors or are over 45, your doctor might order it. It assesses how your heart responds to exercise.
  
  
• Complete cardiological evaluation: It includes a consultation with a cardiologist who will review all your studies and authorize the surgery from a cardiovascular point of view.

Obesity puts extra strain on the heart for years. These tests ensure your heart can tolerate both general anesthesia and the physical stress of surgery.

3. Pulmonary Assessment

Breathing well during and after surgery is essential. Breathing problems are a common complication in people with obesity.

• Chest X-ray: It shows the structure of your lungs and heart. It detects infections, structural problems, or fluid buildup.
  
  
• Spirometry: It measures the capacity and function of your lungs. It's a simple test where you blow into a device that records how much air you can exhale and at what speed.
  
  
• Sleep apnea assessment: Many people with obesity suffer from sleep apnea without knowing it. Your doctor will ask you about snoring, daytime sleepiness, or pauses in breathing during sleep. If sleep apnea is suspected, a sleep study (polysomnography) may be ordered.

If sleep apnea is detected, CPAP treatment is usually started before surgery. This significantly reduces the risk of respiratory complications during anesthesia and recovery.

4. Upper Digestive Endoscopy

This is one of the tests that worries patients the most, but it is absolutely essential before bariatric surgery.

• What is it? It is a procedure where a thin, flexible camera is inserted through your mouth to examine the esophagus, stomach, and the first part of the small intestine.
  
  
• Why is it necessary? The surgeon needs to see the internal condition of your digestive system before operating. Endoscopy detects hiatal hernias, ulcers, inflammation, polyps, or the presence of the Helicobacter pylori bacteria.
  
  
• Helicobacter pylori: This bacterium is very common and can cause ulcers. If detected, it must be treated with antibiotics before surgery to prevent further complications.
  
  
• How to prepare? You must fast completely (no water) from the night before. The procedure is performed under sedation, so you won't feel any pain or remember it. You will need someone to accompany you because you won't be able to drive afterward.
  
  
• Is it uncomfortable? With proper sedation, no. You might have a little throat discomfort for a few hours afterward, but nothing serious.

5. Abdominal Ultrasound

This non-invasive and painless study uses sound waves to create images of your abdominal organs.

What does it evaluate?

• Liver: Detects fatty liver (very common in obesity), cysts or tumors.
  
• Gallbladder: Identify stones or calculi that may need to be removed during surgery.
  
• Kidneys: Evaluate its size, structure and detect stones or cysts.
  
• Pancreas and spleen: Verification of structural normality.

Many patients with obesity have fatty liver. Although it generally doesn't preclude surgery, it's important to know because it can improve significantly after weight loss.

Preparation: It generally requires fasting for 6-8 hours to have better visualization of the gallbladder.

6. Psychological and Nutritional Assessment

This component is as important as physical examinations, although many patients underestimate or fear it.

Psychological evaluation: It's not a judgment on your mental capacity. It's a tool to ensure you're emotionally prepared for the changes to come.

The psychologist will evaluate:

• Your realistic understanding of the procedure and expected results
• Presence of eating disorders such as binge eating or bulimia
• Conditions such as depression or anxiety that require treatment
• Your family and social support network
• Your motivation and commitment to lifestyle changes

Nutritional assessment: The nutritionist will review your current eating habits, dietary history, allergies, and intolerances. They will also begin educating you about the pre-operative diet and nutritional changes after surgery.

Both assessments are not intended to disqualify you, but rather to better prepare you. If areas that need improvement are identified, you will have time to address them before the procedure.

7. Other Specific Examinations Depending on the Case

Depending on your age, gender, and medical history, your doctor may order additional tests:

• Hormone tests: If thyroid problems are suspected, TSH and free T4 levels are ordered. The thyroid regulates metabolism and must be functioning properly.
  
• Colonoscopy: Generally for people over 50 years of age or with a family history of colon cancer.
  
• Gynecological evaluation: Women should have their Pap smear up to date and, in some cases, a pelvic ultrasound.
  
• Urological evaluation: For men over 50, especially if there are prostate symptoms.
  
• Bone densitometry: In cases of risk of osteoporosis, especially postmenopausal women.

Timeline: When are these exams performed?

Most bariatric surgery programs require you to complete all medical exams 2 to 3 months before your scheduled surgery date.

Typical timeline:

• Month 1: Initial consultation, request for tests, and beginning of nutritional and psychological evaluation.
• Month 2: Performing most laboratory tests and imaging studies
• Month 2-3: Endoscopy, specialized evaluations (cardiology, pulmonology)
• Previous weeks: Review of results, necessary adjustments, final authorization

Important: Tests have expiration dates. Blood tests are generally valid for 30 days, while studies like endoscopy can be valid for up to 6 months. If your surgery is delayed, you may need to repeat some tests.

What happens if a test comes back abnormal?

This is one of the biggest concerns I hear.. Breathe: an abnormal result does not necessarily mean you cannot have surgery.

What it does mean is that you need specific attention to that condition before surgery. 

For example:

• If you have anemia, you will receive iron supplements.
• If H. pylori is detected, you will complete a course of antibiotics.
• If your blood pressure is high, your cardiologist will adjust your medication.
• If there are vitamin deficiencies, you will correct them with supplements.

In some cases, surgery may be temporarily postponed to optimize your condition. I know this can be frustrating, but this postponement is for your safety. Surgery performed when your body isn't ready carries significantly more risks.

The most important thing is to follow your medical team's recommendations to the letter. They want to see you recover from the surgery and succeed as much as you do.

Costs and Coverage of Preoperative Examinations

The cost of pre-operative exams varies depending on your location and health system.

• Insurance coverage: Many health insurance plans fully or partially cover medical tests when they are part of an approved pre-operative protocol. Check your policy details and obtain pre-authorizations when necessary.
  
• Investment in health: If you have to pay out of pocket, consider this: you're investing in your safety. The cost of preventing complications is infinitely less than the cost of treating them.
  
• Financial planning: At New Body Bariatric Center, we work with you to help you plan for these expenses. Some institutions offer packages that include all the necessary tests.

Your Path to a New Life Begins Here

Now that you know in detail what medical tests are required before bariatric surgery, I hope you feel calmer and more prepared.. I know the list may seem long, but each of these studies is a piece of the puzzle that guarantees your safety.

RememberThese tests aren't obstacles; they're stepping stones toward your goal. Each one you complete brings you one step closer to the transformation you seek. You're not alone on this journey. Your medical team is with you every step of the way, ensuring that when the day of your surgery arrives, your body is in the best possible condition for success.

Are you ready to take the next step in your transformation? New Body Bariatric Center, Our specialized medical team will accompany you at every stage of the process, from these initial tests to your recovery and beyond. 

Schedule your evaluation appointment today and begin your journey towards a healthier, more active, and fulfilling life.

Frequently asked questions about tests before bariatric surgery